69048-01-7Relevant academic research and scientific papers
ADDITION AND ELIMINATION OF HYDROGEN AND LIGAND SUBSTITUTION ON TRIOSMIUM CLUSTERS. KINETICS AND MECHANISM.
Bavaro, Lynn M.,Keister, Jerome B.
, p. 357 - 368 (1985)
The kinetics of the reversible reaction HOs3(μ-COMe)(CO)10 + H2 H3Os3(μ3-COMe)(CO)9 + CO has been investigated.The reaction of HOs3(μ-COMe)(CO)10 with hydrogen involves dissociation of a CO ligand prior to the rate-determining step, which is proposed to be the oxidative addition of molecular hydrogen.The reaction of H3Os3(μ-COMe)(CO)9 with CO involves rate-limiting hydrogen loss.The equilibrium constant and the competition ratio for hydrogen and CO for the unsaturated intermediate were determined.The mechanism of substitution by AsPh3 on HOs3(μ-COMe)(CO)10 also involves a CO dissociative mechanism.Based upon relative rate constants for CO, AsPh3, and hydrogen addition to HOs3(COMe)(CO)9, CO dissociation and hydrogen addition are proposed to occur at different metal sites.
